New Hampshire Heat Advisory | Effective 05/18/2026 11:12

Headline: 
Heat Advisory issued May 18 at 2:12PM EDT until May 19 at 8:00PM EDT by NWS Gray ME
Event: 
Heat Advisory
Urgency: 
Expected
Effective: 
May 18, 2026 - 11:12am
Expires: 
May 19, 2026 - 12:00am
Description: 
* WHAT...Heat index values up to 95 expected. * WHERE...Western and Central Hillsborough, Eastern Hillsborough, and Interior Rockingham Counties. * WHEN...From 11 AM to 8 PM EDT Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...It will remain warm Tuesday night as overnight lows only dip into the lower 70s.
Instruction: 
Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.
Area Description: 
Eastern Hillsborough; Interior Rockingham; Western And Central Hillsborough
Forcast Office: 
NWS Gray ME